OF TWO SPECIES OF BRITISH DOLPHINS. 5 



Total length, in a straight line from end of beak to uotch in middle inches. 



of tail 1140 



End of beak to anterior edge of dorsal fin 50-0 



„ „ angle of mouth I2'5 



„ ,, blow-hole I5"0 



,, „ anterior angle of eye 14'7 



Length of eye-aperture I'l 



From hinder corner of eye to aperture of ear 3'25 



From angle of mouth to anterior angle of eye 2"6 



From end of lower jaw to anterior edge of pectoral fin 24'0 



Length of pectoral fin, in straight line 15'5 



Greatest breadth of pectoral fin 6"0 



Length of base of dorsal fin 13"0 



Height of dorsal fin 9'0 



Breadth of caudal fin 24'0 



All the upper parts were of a shining greyish black, shading off to white below, as 

 seen in the figure, the change of colour following an irregular line from the angle of 

 the mouth to the origin of the pectoral fin and continued backwards at the same level. 

 The edge of the upper lip and the tip of the nose were whitish ; both sides of the 

 pectoral and caudal fins were black. There was no other colour to be distinguished 

 on the whole surface but black, white, and the intermediate grey. The usual " screw" 

 form of the caudal fin in the Cetacea was very marked, the upper surface of the right 

 lobe being concave, that of the left lobe convex. 



This species is rare in the Mediterranean, though Gervais gives several instances of 

 its capture in the Gulf of Lyons. It probably has a more northern range than 1). 

 delpMs ; but, as in the case of that species, there is still much obscurity as to the 

 exact limits of its distribution. 



Mr. Buckland has added casts of both these specimens to his valuable series of 

 models of Cetacea, which exhibit, better than by any other method yet devised, the 

 form, proportions, and colour of these animals, otherwise so difficult of preservation. 



DESCRIPTION OF THE PLATE. 



PLATE I. 

 Fig. 1. Belpliinus delpMs 2 , from an original drawing, by R. W. Sherwin, of a specimen 



captured ofi" the coast of Cornwall in March 1879. 

 Fig. 2. Delpkinus tursio <^, from an original drawing, by W. H. Flower, of a specimen 

 captured near Holyhead, October 5, 1868. 



